#404C90
Closest named color: Twilight (#4E518B). oklch(44.2% 0.112 273.4), rgb(64, 76, 144).
Aa
White text reads best on this color (7.91:1).
About this color
#404C90 is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.112 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.028 away. White text reads best on it, at 7.91:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.112) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.65:1 |
| White text | 7.91:1 |
Values
| HEX | #404C90 |
| RGB | rgb(64, 76, 144) |
| HSL | hsl(231, 38%, 41%) |
| OKLCH | oklch(44.2% 0.112 273.4) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #404C90 | 7.91:1 | AAA | Lc -92.0 | Preferred for body text |
| Black text on #404C90 | 2.65:1 | Fails | Lc 16.7 | Dividers and decoration only |
| #404C90 text on white | 7.91:1 | AAA | Lc 87.3 | Fine for body text |
| #404C90 text on black | 2.65:1 | Fails | Lc -14.9 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 800.
-
Step 50
50
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5E9F7
oklch(93.5% 0.019 273.2)
-
Step 200
200
#D1D8F2
oklch(88.5% 0.037 273.7)
-
Step 300
300
#B3BEEC
oklch(80.9% 0.066 274.3)
-
Step 400
400
#8B9CE2
oklch(70.7% 0.105 273)
-
Step 500
500
#7082DA
oklch(63.2% 0.134 273.3)
-
Step 600
600
#5969C7
oklch(55.5% 0.146 273.5)
-
Step 700
700
#4957AC
oklch(49% 0.135 273.3)
-
Step 800
800 (this color)
#404C90
oklch(44.2% 0.112 273.4)
-
Step 900
900
#333D6F
oklch(37.7% 0.086 273.1)
-
Step 950
950
#1E2441
oklch(27% 0.055 273.4)
#404C90 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #2D5593 | 0.030 |
| Deuteranopia (no green cones) | #244E8F | 0.032 |
| Tritanopia (no blue cones) | #185B67 | 0.099 |
| Achromatopsia (no color) | #515151 | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #404C90
#404C90
oklch(44.2% 0.112 273.4)
- #645100
#645100
oklch(44.1% 0.09 93.2)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #404C90, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.028
- Blueberry #464196 ΔE 0.032
- Dusk Blue #26538D ΔE 0.034
- Dark Slate Blue #483D8B ΔE 0.040
- Cobalt #1E488F ΔE 0.042
- Denim Blue #3B5B92 ΔE 0.042
- Dusk #4E5481 ΔE 0.043
- Light Navy Blue #2E5A88 ΔE 0.047
Use #404C90 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.